Improvement in alarm-locks



T. B. LUMPKIN & W. D. BENSON.

' Alarm-Loek.

Patented Dec. 3,1878.

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,Zammumgz'( gli@ MIJVVEJVYORS UNITED STATES PATENT l'llCElv THOMAS B. LUMPKIN ANT) WILLIAM D. BENSON, OF ROSSVILLE, S. C.

IMPROVEMENT IN ALARM-LOCKS.

Specification forming part of Letters Patent No. 210,546, dated December 3, 1878; application filed October 16, 1878.

To all whom it may concern:

Be it known that we, THOMAS B. LUMPKIN and WILLIAM D. BENsoN, of Rossville, in the county of Chester andV State of South Garolina, have invented certain new and useful Improvements in Locks 5 and we do hereby declare that the following is afull, clear, and exact description th ereof, which will en able others skilled in the art to which it appertains to make and use the same, reference being had to thc accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention has for its object to furnish a burglar-alarm lock 5 and it consists in the combination of two locks, so constructed and connected together by levers and arms that the unlocking of one will cause the discharge ot' a loaded pistol, and cause thelockin g of the other.

In the drawings, Figure 1 shows the inner mechanism of the two locks constructed and arranged according to our invention, and Fig. 2 shows a modification in the construction of the lower lock, in order to provide suitable connecting mechanism when the intermediate pistol is dispensed with.

a is the casing or block, in which are secured the two locks b and c, arranged, by preference, one above the other. The combined lock may y be attached to the door with either lock b or lock c uppermost, as maybe desired. We have shown them arranged with lock b uppermost.

On the lower left-hand corner of the casing a we have placed a section, al, hinged at a2, so that it will turn down out of its place when desired,itbeing held in place by aspring-catch, a3. Mounted on this section al is a pistol or alarm gun, d, so arranged with reference to thelock c that the bolt ot' the latter will strike the nipple d and explode the charge.

The bolt b1 of the lock b slides on a pin, b2, and has its rear end provided with a project` ing arm or pin, b, against which the spring b4 bears, as shown. e is a dog, which turns on the pin b2, and is provided with notches or shoulders el e?, which engage the pin b5 on the bolt b, and hold thc latter locked or unlocked, as required. The dog e is held down by a spring, e3. Formed on the rear end of the dog e, and projecting outward from the recess in which the lock b is placed, is the lever-arm. cl, by which the notch or shoulder el may be disengaged from the pin b5, so that the said bolt b1 maybe thrown outward by the spring b4.

f is a lever pivoted to the frame a, so that its upper curved end, f1, bears on the outer end of the lever-arm e4, while its lower end, f2, extends downward to and infront of the muzzle of the pistol d. f The bolt cl of the lock c is provided with a stop, c", and slides horizontallyv on a pin, c3, on which is pivot-ed a dog, c4, provided with notches c5 c6, which engage the pin c2. The dog c4 is held in place by a spring, c7. On the rear end of the bolt c1 there is formed an extension, o8, on which is a hammer or head, e9, arranged to strike the nipple d in the rear movement of said bolt and explode the charge in the pistol d. The bolt cl is thrown back by the strong spring g, which has one end attached to the case, and the other to the rear end ot' said bolt, as shown. Suitable key-holes h h1 h2 are provided; also, a suitable key-hole is provided, (not shown in the drawings,) whereby the catch a3 may be disengaged by drawing back the connecting link or rod t'. rlhe catch a3 may also be thrown back by direct pressure exerted on it. A suitable spring, 7c, is placed behind the hinged block al to throw the latter open when the catch a3 is disengaged.

The operation of the device is as follows: The pistol d is loaded with a wad of sufficient solidity, which, when. the charge is exploded, will force outward the end f2 of the levcrf. The lock c is fastened, as shown, and the lock b is left unlocked. Any attempt to unlock the lock c will release the dog c4 from its pin c2, when the spring g will throw back the bolt c1, and the hammer 09 will strike and explode the cap on nipple d and the charge in the pistol d. The wad from the pistol will strike the end f2 of the lever f, and the end j'1.will press down on the arm c4 ofthe dog c and raise the latter from its hold on the pin c1, thus releasing the bolt b1, which will be forced outward by the spring b, and thus fasten the lock b. If dcsired, both locks may be locked.

lf the first to be unlocked should be lock I), then in unlocking lock c the said lock b would be relocked, as above explained.

lf the lock c should be the irst unlocked,

the alarm would be given by the exploding of the pistol, While the lock b would hold the door fast.

It will be understood that this lock could be used Without the pistol d in case the alarm be not desired. In this case the pistol would not be attached,and the end o8 of the bolt cl would be extended suflciently, as shown in Fig.2, so that in the backward movement of the bolt the head clowould strike the end f2 of lever f, giving the same result as described for the use of the pistol and \vad. To prefer always t0 use the pistol, as thereby We secure an alarm as well as the locking of lock b.

Having thus described our invention, what we claim, and desire to secure by Letters Patent7 isll. rlhe combination, with the bolt b in lock b and bolt c, having extension e8 in lock c, of the dog c, having the extension or arm e, le-

constructed as described, and arranged, re-

spectively, in locks b and e, and operated by springs b4 and g, and dog e, having the extension e, of' the pistol d and rocking leverf7 all arranged to operate substantially as set forth.

In testimony that We claim the foregoing as our own We afiix our signatures in presence ot two Witnesses.

THOMAS B. LUMPKIN. YVILLIAM D. BENSON.

Witnesses:

JACOB BAKER, 1). B. LUMPKIN. 

